Solving division word problems: How many in each group?
About this video
The video solves a division word problem: 18 choir students stand in 3 equal rows. The instructor shares the students one at a time into the rows, finds 6 in each row, and checks the answer with addition (6 + 6 + 6) and multiplication (6 x 3 = 18).
You'll be able to
- share a total into equal groups to find how many are in each group.
- write a division like 18 divided by 3 = 6 for a word problem.
- check a division answer using addition or multiplication.
Key words
- equal rows
- Rows that all have the same number of things in them.
- divide
- To split a total into equal groups.
Transcript
- [Instructor] We're told there are 18 students in a school choir. They need to stand in three equal rows for their performance. How many students will there be in each row? Pause this video and try to do this yourself before we do this together. Alright, now let's do this together.
What I'm gonna do is first I'm gonna set up the rows and then I'm gonna, one by one, put these 18 students into the rows and see how many end up in each row. So let's call, let me make three lines here for the three rows. So there and there. So this is row one, this is row two, this is row three.
And I'm just gonna use a circle to represent each of the students in the choir. So I'm gonna put the first student in row one, the second student in row two, the third student in row three. And so I'm just gonna keep doing that, doing one at a time into each row.
So 1, 2, 3, I'm gonna count all the way to 18. 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, and 18. All right, it looks like I got the exact same number of circles or students in each of these three rows. How many are there? It looks like 1, 2, 3, 4, 5, 6 in each of these rows.
There's six here, six here, and six here. And that makes sense because if I add six plus six plus six, I get to 18. If I say six times three, that's 18. Or if I say I have 18 students and I wanna divide them into three equal rows, that is going to be equal to six.
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